A method of sending a data signal having a series of symbols to a receiver includes generating multiple OFDM signals, which are transmitted by multiple transmitter entities. For example, a partially transparent aluminum layer having a thickness of less than 20 nm, coated with a dielectric layer and an absorber layer, provides a color shifting optical stack that is partially transparent, so that an image or text printed on the substrate under the optical stack or on the opposite side of the substrate, is visible therethrough. A second member is located toward the back of the sole and substantially centered between the heel and toe edges of the sole. Then, for each facies, relations connecting the seismic impedances of wells to differential pressures in wells are determined in each analysis interval. The present invention includes a sump housing having a heater container containing a heater therein and at least one motor guide rib projected from a bottom of the heater container and a wash motor having a motor housing provided with a rib container containing the at least one motor guide rib therein.